Can I still buy a carrycot to go on this chassis please?
Well, yes, you should be able to get a carrycot for the Stokke Xplory line - in any shop that still sells Stokke strollers. I mean, the newer bassinets should still fit! Best is, of course, trying out at the store. Or you can always ask the store for the availability of the older type carrycot, they might be able to order one as a spare part.
Next in line, if you have an older Xplory model, you should always go through classifieds and get a carrycot second-hand- I mean, one uses the particular Xplory carrycot about 4 months and with a small baby that pretty much lies inside only, so it should still look like new even.
Or browse eBay ad look what's up out there.
These are the things I would do, at least 😉